Finding the Fourth Proportional to 538,111.72, 742,599.30 and 296,395.30

Step by Step Solution

1. Step 1: Write the proportion equation
   538,111.72 : 742,599.30 = 296,395.30 : x
2. Step 2: Convert to fraction form
   538,111.72/742,599.30 = 296,395.30/x
3. Step 3: Cross multiply
   538,111.72x = 742,599.30 × 296,395.30
4. Step 4: Simplify right side
   538,111.72x = 220,102,942,303.29
5. Step 5: Solve for x
   x = 220,102,942,303.29/538,111.72
6. Step 6: Final answer
   x = 409,028.34